ESPN2’s live telecast of the Formula 1 British Grand Prix averaged 1.5 million viewers, a 19 percent audience gain over last year’s race.

Last season Formula E introduced its Gen3 car, which was its fastest and most powerful to date, enabling the series to topple a number of records.New benchmarks for the fastest average lap time and the highest speed were set, while there was more race leaders and more overtakes than ever...